No video clips on websites

[tygrysuav]

I can't watch videos placed on websites. Here is an example of my problem:

http://joemonster.org/filmy/75646/Luk_i ... Technology

As you can see there is a blank space in the place provided on video. YT, Vimeo or others services such kind work fine. I use Firefox 45, Mint 17.3 Cinnamon. The problem appeared today.

[Alexiy]

I can't see blank space, the video works for me.

[tygrysuav]

I have installed another browser (Chrome) and videos are visible. Firefox in Windows also play them. So it has to be something with FF and linux in common.

[jimallyn]

The video plays fine for me, using Linux Mint 17.2 Cinnamon and Firefox 45.0. Does it play if you try it on Youtube?

https://www.youtube.com/watch?v=SLoukoBs8TE

[tygrysuav]

Yes it does. YouTube, Vimeo etc. I've checked Preferences in Firefox but they look normal.